64     SkM44 computeRotation(SkV2 a, SkV2 b) const {  in computeRotation()
66         return SkM44::Rotate(axis, angle);  in computeRotation()
70 static SkM44 inv(const SkM44& m) {  in inv()
71     SkM44 inverse;  in inv()
77 static SkM44 normals(SkM44 m) {  in normals()
96         SkM44 camera = SkM44::LookAt(fEye, fCOA, fUp),  in concatCamera()
97               perspective = SkM44::Perspective(fNear, fFar, fAngle),  in concatCamera()
98               viewport = SkM44::Translate(area.centerX(), area.centerY(), 0) *  in concatCamera()
99                          SkM44::Scale(area.width()*0.5f, area.height()*0.5f, zscale);  in concatCamera()
109     static SkM44 T(SkScalar x, SkScalar y, SkScalar z) {  in T()
110         return SkM44::Translate(x, y, z);  in T()
113     static SkM44 R(SkV3 axis, SkScalar rad) {  in R()
114         return SkM44::Rotate(axis, rad);  in R()
117     SkM44 asM44(SkScalar scale) const {  in asM44()
122 static bool isFrontFacing(const SkM44& m) {  in isFrontFacing()
123     SkM44 m2(SkM44::kUninitialized_Constructor);  in isFrontFacing()
196     SkM44 rotation() {  in rotation()
208         return SkM44::Rotate(fAxis, fAngle);  in rotation()
239     SkM44 fRotation;        // part of model
268     virtual void drawFace(SkCanvas*, SkColor, int face, bool front, const SkM44& localToWorld) = 0;
280         SkM44 m = fRotateAnimator.rotation() * fRotation;  in draw()
286                 SkM44 trans = SkM44::Translate(200, 200, 0);   // center of the rotation  in draw()
291                 SkM44 localToWorld = m * f.asM44(200) * inv(trans);  in draw()
408                   const SkM44& localToWorld) override {  in drawFace()
455     void drawFace(SkCanvas* canvas, SkColor color, int face, bool front, const SkM44&) override {  in drawFace()  argument